It's unsurprising this is the case: to be published as a Recommendation you have to demonstrate interoperable implementation experience. The implementation rep

It's unsurprising this is the case: to be published as a Recommendation you have to demonstrate interoperable implementation experience. The implementation report is at https://www.w3.org/2019/01/webauthn-report.html https://www.w3.org/2019/01/webauthn-report.html and shows Safari passing most of it, AFAICT. (Though it's based on Safari Technology Preview and is yet to ship.)